ASX Release / 21 September 2020

Presentation to 2020 Denver Gold Forum

Craig Jetson, Managing Director and CEO, will present to the Denver Gold Forum being held virtually this week.

A webcast of the presentation will be available on the Gold Forum Americas website at https://www.denvergold.org/company-webcast/dgf20/131/, and subsequently on the St Barbara website at www.stbarbara.com.au/investors/webcast/.

Investor Relations Mr David Cotterell Manager Investor Relations +61 3 8660 1900 ASX: SBM Media Relations Mr Ben Wilson GRACosway +61 407 966 083 ADR: STBMY Authorised by Mr Rowan Cole Company Secretary +61 3 8660 1900 St Barbara Limited Level 10, 432 St Kilda Road, Melbourne VIC 3004 T +61 3 8660 1900 F +61 3 8660 1999 ACN 009 165 066 Locked Bag 9, Collins Street East, Melbourne VIC 8003 W www.stbarbara.com.au Denver Gold Forum 2020 20-23 September 2020

Craig Jetson Managing Director and Chief Executive Officer

1 / Denver Gold Forum 2020 Forward statements

This presentation has been prepared by St Barbara Limited (“the Company”). The material contained in this presentation is for information purposes only. This presentation is not an offer or invitation for subscription or purchase of, or a recommendation in relation to, securities in the Company and neither this presentation nor anything contained in it shall form the basis of any contract or commitment. This presentation is not a financial product or investment advice. It does not take into account the investment objectives, financial situation or particular needs of any investor. Before making an investment in the Company, an investor or prospective investor should read this document in its entirety, consider whether such an investment is appropriate to their particular investment needs, objectives and financial circumstances, seek legal and taxation advice appropriate to their jurisdiction and consult a financial adviser if necessary. The Company is not licensed to provide financial product advice in respect of the Company’s securities. This presentation may contain forward-looking statements that are subject to risk factors associated with exploring for, developing, mining, processing, sale of gold, as well as financing, hedging and sovereign risk matters. Forward-looking statements include those containing such words as anticipate, estimates, forecasts, guidance, outlook, should, will, expects, plans or similar expressions. Such forward-looking statements are not guarantees of future performance and involve known and unknown risks, uncertainties, assumptions and other important factors, many of which are beyond the control of the Company. It is believed that the expectations reflected in these statements are reasonable but they may be affected by a range of variables and changes in underlying assumptions which could cause actual results or trends to differ materially. Nothing in this document is a promise or representation as to the future. Actual results may vary from the information in this presentation and any variation may be material. Past performance is not an indication of future performance. Statements or assumptions in this presentation as to future matters may prove to be incorrect and any differences may be material. The Company does not make any representation or warranty as to the accuracy of such statements or assumptions. Investors are cautioned not to place undue reliance on such statements. This presentation has been prepared by the Company based on information available to it and has not been independently verified. No representation or warranty, express or implied, is made as to the fairness, accuracy, completeness or correctness of the information, opinions and conclusions contained in this presentation. To the maximum extent permitted by law, none of the Company or its subsidiaries or affiliates or the directors, employees, agents, representatives or advisers of any such party, nor any other person accepts any liability for any loss arising from the use of this presentation or its contents or otherwise arising in connection with it, including without limitation, any liability arising from fault or negligence on the part of the Company or its subsidiaries or affiliates or the directors, employees, agents, representatives or advisers of any such party. The Company estimates its Ore Reserves and Mineral Resources in accordance with The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves 2012 Edition ("JORC Code"), which governs such disclosures by companies listed on the Australian Securities Exchange. The JORC Code differs in several significant respects from Industry Guide 7 of the US Securities and Exchange Commission (“SEC”), which governs disclosures of mineral reserves in registration statements and reports filed with the SEC. In particular, Industry Guide 7 does not recognise classifications other than Proved and Probable Reserves, and the SEC does not permit mining companies to disclose Mineral Resources in SEC filings. The Company’s fiscal year (‘FY’) is 1 July to 30 June, e.g. FY20 = 1 July 2019 to 30 June 2020. The Company uses Australian dollar presentation currency for reporting purposes. Financial figures are in Australian dollars unless otherwise stated. Several items in this presentation are shown in US dollars to aid comparison. US$ in this presentation converted from previously published A$ results using FX rates used in preparation of published quarterly reports and financial statements as follows: Averages: FY20 = 0.6713, FY19 = 0.7152, FY18 = 0.7751, FY17 = 0.7539, FY16 = 0.7281. 30 Jun spot rates: 2020 = 0.6904, 2019 = 0.7021, 2018 = 0.7407, 2017 = 0.7695, 2016 = 0.7452 (Thomson Reuters). All forward looking estimates converted at A$1.00 = US$0.71 per FY21 guidance released in June 2020 Quarterly Report. For reference, at 18 September 2020 A$1.00 = US$0.7320 www.rba.gov.au Australian Securities Exchange (ASX) Listing code “SBM” American Depositary Receipts (ADR OTC code “STBMY”) through BNY Mellon, www.adrbnymellon.com/dr_profile.jsp?cusip=852278100 Title slide picture: Leonora Operations, Western Australia Published: 21 September 2020 2 / Denver Gold Forum 2020 Contents

• We are St Barbara • Safety • FY20 in review • Operations & Growth Projects o Atlantic Gold o Gwalia o Simberi • Exploration • Outlook

3 / Denver Gold Forum 2020 We are St Barbara. A growing gold company with a global outlook. An ASX 200 company, our gold mining operations are located in Australia, Canada and Papua New Guinea. As we operate our business and care for our people, we are guided by our five commitments and values-led culture. At St Barbara, doing the right thing is important to all of us.

4 / Denver Gold Forum 2020 We are St Barbara We are guided by our five commitments and our values-led culture

SAFETY EMPOWERED PEOPLE STRONGER RESPECTING THE GROWING ALWAYS DIVERSE TEAMS COMMUNITIES ENVIRONMENT SUSTAINABLY

Zero harm is always We are an employer We strive to help our We are committed to Growing our business our target. Zero harm of choice committed communities thrive, caring for the sustainably, where it to all people as we to inclusion and grow and prosper. environment. makes sense, and with responsibly operate diversity. We provide We build meaningful We think differently strong governance our assets to their full a caring work relationships, to find solutions to practices, means we potential. This focus environment where investing time and actively manage and can add value for on safety guides our talented people energy to ensure neutralise our everyone: our everything we do. are happy, thrive, feel local communities impact; because we shareholders, our safe and can fulfil are enriched by care about the people and our their potential. being our environment and our communities. neighbours. planet.

5 / Denver Gold Forum 2020 We have improved our safety record and have proactively managed the risks that COVID-19 presents

The TRIFR of 3.0 at the end of June 1 Total Recordable Injury Frequency Rate (TRIFR) FY20 corresponds to 16 low severity injuries in the last 12 months & 3 months recordable injury free 5.0 LTIFR2 of 0.4 at the end of June FY20

3.0 No COVID-19 cases detected at sites, however risk remains and vigilance is 2.1 2.1 being maintained

1.2 SBM COVID-19 Management Framework Support Barriers Programs of support for Proactive control to prevent the personnel and their families virus from entering the workplace

FY16 FY17 FY18 FY19 FY20

Tracing Monitoring Identifying the path of Controls to protect all infection personnel in the workplace 6 / Denver Gold Forum 2020 1. Total Recordable Injury Frequency Rate (12 month avg.), total recordable injuries per million hours worked 2. LTIFR = Lost Time Injury Frequency Rate (12 month avg.), the number of lost time injuries per million hours worked We have shown solid performance in FY20 with a healthy growth pipeline ahead

Improved safety record

Significant free cash flow from operations

Continued focus on productivity improvements

An employer of choice with a caring, diverse and inclusive culture

Maintained A$0.08 annual dividend

Progressed expansion projects to sustain long term growth

7 / Denver Gold Forum 2020 Snapshot of St Barbara (SBM.ASX) - A global ASX 200 gold producer

Market Market Capitalisation1 A$2.4 B @ A$3.37/share (US$1.7 B)

Outstanding shares1 704 M

Liquidity2 6 M/day (0.8%)

Financial FY20 EPS3 A$0.18 (US$0.12) St Barbara has a strong balance sheet supported FY20 total dividend A$0.08 (US$0.05) by operational performance providing a Cash and term deposits4 A$206 M (US$142 M) platform for growth

Debt5 A$107 M (US$74 M)

Reserves / Ore Reserves (JORC)6 6.0 Moz Resources Mineral Resources 6 11.6 Moz

1. As at close 18 Sep 2020. FX conversion as per page 2 2. 3 months to 18 Sep 2020, Deutsche Bank 3. Basic EPS for FY20 4. As at 30 June 2020 cash balance comprises A$178 M cash and A$228 M term deposits, less A$200 M used to reduce debt 30 July 2020 8 / Denver Gold Forum 2020 5. As at 30 June 2020 debt comprises A$200 M and C$100 M syndicated debt facility (repayment date July 2022), excluding A$28 M lease labilities, less A$200 M repaid 30 July 2020 6. Refer corresponding Ore Reserves and Mineral Resources slides in Appendix as at 30 June 2020 Maintained returns to shareholders since recommencing dividends in FY17

Fully franked final dividend of A$0.04 (US$ 0.03) per 154 Dividends 149 share to be paid per ounce 135 (US$119) (US$100) 29 September 2020 produced (US$97) (A$/oz)1 81 (US$61) Dividend represents A$149 (US$100) per ounce of gold produced1

Dividends 34 Cumulative dividend Cumulative paid payments of A$0.34 26 (A$ cps) Interim (US$0.25) per share or Final 18 A$198 M (US$144 M) since FY17 6 4 4 4 8 6 4 4 Dividend yield of 2.4%2

FY17 FY18 FY19 FY20 1.Gross dividends paid ÷ gold production in ounces (attributable to St Barbara) 2.Annual dividend yield is a Non IFRS measure. Calculated as (interim plus final dividend) ÷ share price at date final 9 / Denver Gold Forum 2020 dividend announced 3.FX conversion as per page 2 We are forecasting sustained performance in FY21 across our assets

AISC1 (A$/oz) 1,369 1,4352 891 1,080 (US$919) (US$1,019) (US$691) (US$772) Production Atlantic Gold (koz) 403 FY20 saw high ore production tonnages at 370 – 410 382 Touquoy while permitting on expansion 362 projects progress 95 - 105 135 104 142 Gwalia Delivered FY20 guidance on back of record setting Q4 performance 171 175 - 190

268 Simberi 220 FY20 production robust despite lower grades 107 100 - 115

FY18 FY19 FY203 FY21F Atlantic Gold Leonora Simberi 10 / Denver Gold Forum 2020 1. Non-IFRS measure, refer to corresponding slide in Appendix. FX conversion as per page 2 2. Midpoint of FY21F all-in sustaining cost guidance of A$1,360 to 1,510 per ounce 3. Atlantic Gold production from 1 July 2019, includes 4,362 ounces produced by Atlantic Gold prior to acquisition Atlantic had a record performance in FY20 post acquisition

AISC (A$/oz) 1,0281 862 928 Record performance at Touquoy (US$730) (US$616) (US$623)

Milled grade Work continues on the optimal (g/t Au) 1.36 1.34 1.33 sequencing of the suite of Atlantic Gold projects Consolidation of Touquoy ownership Production enables operational efficiencies and (koz) 115 102 100 future potential of the operation, 93 Commercial including exploration upside production declared March 2018 40

4

2 FY18 FY19 FY20 FY21F Pre-acquisition SBM attributable

1. Midpoint of FY21F all-in sustaining cost guidance of A$955 to 1,100 per ounce (C$880 to C$1,010 per ounce @ AUD 0.92) 11 / Denver Gold Forum 2020 2. Atlantic Gold production from 1 July 2019 was 106,663 ounces, includes 4,362 ounces produced by Atlantic Gold prior to acquisition. 3. FX conversion as per page 2 Gwalia continues to produce sustainably at lower grades

1 AISC 1,485 1,498 (A$/oz) 1,027 Record material movement achieved in (US$997) (US$1,063) 785 802 Q4 FY20 supporting the delivery of full (US$735) (US$592) (US$622) year production guidance

1H FY21 will prioritise development to Mined Grade 12.5 (g/t Au) allow for more operational areas to 10.7 11.1 8.3 support greater production rates in the 7.7 medium term Production Reserve Grade2 (koz) 6.3 g/t Au June 2020

265 268

220 190 175 171

FY17 FY18 FY19 FY20 FY21F 1. Midpoint of FY21F all-in sustaining cost guidance of A$1,435 to 1,560 per ounce 2. Refer to ASX announcement ‘Ore Reserves and Mineral Resources Statement 30 June 12 / Denver Gold Forum 2020 2020’ released 24 August 2020 3. FX conversion as per page 2 Gwalia returning to higher levels of material movement

Mined grade (g/t Au) 12.5 10.7 11.1 7.7 Gwalia extension project ventilation 8.3 Reserve Grade shaft completed in August 2020 will Total material moved 6.3 g/t Au June 2020 (kt) support growth of total material 1,218 movement in FY21 1,126 1,137 1,052 1,057 32 11 174 42 71 3 336 Paste Aggregate Fill (PAF) plant 397 331 337 study has commenced to identify 361 opportunities to sustain high utilisation rates

790 697 705 679 625

FY17 FY18 FY19 FY20 FY21F Ore mined Development waste Raisebore waste PAF 13 / Denver Gold Forum 2020 Simberi delivered a solid FY20

AISC (A$/oz) 1 1,631 1,753 1,187 1,068 1,162 Steady production from remaining (US$1,095) (US$1,244) (US$895) oxide reserves (US$828) (US$831)

Milled grade (g/t Au) 1.64 Feasibility Study progressing to 1.19 1.35 1.17 1.25 determine expansion potential. Reserve Grade1 1.2 g/t Au June 2020 Potential decision on Sulphides in March quarter FY21 Production (koz)

142 135 Renewed management team bring expertise from other large gold 116 105 104 95 mines in PNG

FY17 FY18 FY19 FY20 FY21F

1. Midpoint of FY21F all-in sustaining cost guidance of A$1,665 to 1,840 per ounce 14 / Denver Gold Forum 2020 (US$1,185 to US$1,305 per ounce @ AUD 0.71) 2. Refer to ASX announcement ‘Ore Reserves and Mineral Resources Statement 30 June 2020’ released 24 August 2020 Resources and Reserves significantly increased by Simberi sulphide exploration and Atlantic acquisition

Resources Net +2.0 Moz primarily due to Atlantic Gold acquisition and Simberi Sulphide update FY19 4.8 0.6 0.9 3.3 9.6 Gwalia decreased due to mining and sterilisation FY20 4.4 0.60.6 3.7 2.2 11.6 Simberi oxide decreased due to mining depletion

Reserves Net +1.9 Moz primarily due to Atlantic Gold FY19 2.1 1.4 4.1 acquisition and Simberi Sulphide update Gwalia decreased due to mining depletion

FY20 1.9 1.8 1.7 6.0 Atlantic Gold Gwalia Simberi Oxide Simberi Sulphide Tower Hill

15 / Denver Gold Forum 2020 Note: For full details refer to ASX announcement ‘Ore Reserves and Mineral Resources Statement 30 June 2020’ released 24 August 2020 To maintain our future reserves, we are continuing to invest in exploration and have a healthy pipeline of targets Australia/PNG Atlantic Canada

A$8 – $9 M (US$6 M) Leonora regional A$10 – $12 M (US$7 – 9 M) across four main camps in A$10 – $11 M (US$7 – 8 M) at Pinjin, Back Creek and the JVs Nova Scotia: Touquoy, Moose River Corridor, NE Regional and SW Regional A$2 – $3 M (US$1 – 2 M) on Simberi oxide drilling and the Tabar Island group 16 / Denver Gold Forum 2020 Note: For full explanation and results refer to ASX release 29 July 2020 ‘Q4 June FY20 Quarterly Report’. FX conversion as per page 2 In FY21, we intend to drive transformative value improvements across all aspects of our business

Integrated company-wide transformation project underway Company Encompasses all aspects of our operations and capital projects Transformation Operating model to prioritise technical expertise and embed business improvement Improved productivity and reduced costs to lay the foundation for longer-term strategy

Atlantic Gold Progress the Environmental Impact Statement (EIS) for each development project Optimise sequencing of these projects

Capitalise on increased ventilation from completion of Gwalia Extension Project (GEP) Gwalia Optimise development, maximise ore extraction and production Drive identified business improvement opportunities

Progress sulphide project feasibility study Simberi Operations team continues to deliver the current oxide mine plan

17 / Denver Gold Forum 2020 Operational overview

Supplement

18 / Denver Gold Forum 2020 Sustainability highlights FY20

 Greenhouse gas emission targets supporting Paris 2015  Continued engagement with traditional owners and support indigenous communities across all locations  Trial of solar powered battery system underway at Atlantic Gold, seeking to drive to carbon neutrality  Planning ultra-low footprint infrastructure for Beaver Dam project in Nova Scotia utilising inflatable structures  Building local businesses and employment in PNG  Ongoing support for gender safety including warrior program in PNG  Ongoing charitable support across all our operations  Adoption of new Modern Slavery policy  Supporting our communities with COVID PPE and local donations  Leonora Shooting Stars program shortlisted in the Department of Mines, Industry Regulation and Safety 2020 Community Partnership Resource Sector Award

19 / Denver Gold Forum 2020 We are at the forefront of inclusion and diversity in the minerals industry, ahead of much larger peers

FY20 progress Women across our Australian workforce increased to 26% against targets Women across our PNG workforce increased to 15%, achieving 3-year target 33% of Directors are women1 100% of women have returned to work from parental leave three years in a row Nil gender pay gap in ‘like-for-like’ roles2

External Employer of Choice for Gender Equality by WGEA3 – 6th year running and recognition of the only ASX listed mining company to receive the citation our performance WGEA Pay-Equity Ambassador Appointment – Craig Jetson, Managing Director & CEO 2019 Mining Journal Awards (runner-up) as a ‘Gender Diversity Leader’ PNG Business Coalition for Women – maintaining active membership

1. Compared to 26.8% nationally, WGEA Australia’s gender equality scorecard Nov 2019, www.wgea.gov.au/sites/default/files/documents/2018-19-Gender-Equality-Scorecard.pdf 20 / Denver Gold Forum 2020 2. Refer St Barbara Corporate Governance Statement for details, www.stbarbara.com.au/about_us/governance 3. Australian Workplace Gender Equality Agency, www.wgea.gov.au/ Our commitment to sustainable operations across our people & environment has been recognised by multiple awards

.. and progressed on .. leading to recognition We’ve engaged our people… environmental initiatives through awards

71% favourable engagement New climate change targets: meeting our Australian Council of response in employee obligations for Paris 2015 with a goal of Superannuation Investors (ACSI) engagement survey carbon neutrality by 2050 rated us as ‘Leading’ in the materials sector for ESG reporting Care packages and mental health Atlantic Gold leading the effort with and wellbeing online seminars to scalable salt-water battery technology Rated in the 2nd quintile in support our people through Macquarie’s 2019 ESG Ratings Paste aggregate fill (PAF) plant at Gwalia COVID-19 Survey stores waste underground reducing diesel emissions Leonora received Gold WaterWise Business Award for second time Absorption chiller at Gwalia runs on waste heat, reducing energy consumption and emissions 21 / Denver Gold Forum 2020 Consolidated production, costs and guidance summary

Q1 Sep Q1 Sep Production Summary Year Q2 Dec Q3 Mar Q4 Jun Guidance Guidance FY20 FY20 FY20 Consolidated FY 19 FY20 FY20 FY20 FY20 FY21 AG full qtr AG SBM attrib.

St Barbara’s financial year is Year to Qtr to Qtr to Qtr to Qtr to Qtr to Year to Year to Year to 1 July to 30 June 30 June 2019 30 Sep 2019 30 Sep 2019 31 Dec 2019 31 Mar 2020 30 Jun 2020 30 June 2020 30 June 2020 30 June 2021 Production Gwalia oz 220,169 38,153 38,153 42,022 39,684 51,297 171,156 170-180 koz 175-190 koz Simberi oz 142,177 27,061 27,061 23,070 25,831 28,106 104,068 105-115 koz 95-105 koz Atlantic 7 oz 92,639 7 22,355 17,993 29,067 26,032 29,209 106,663 95-105 koz 100-115 koz Consolidated oz 362,346 87,569 83,206 94,159 91,547 108,612 381,887 370-400 koz 370-410 koz Mined Grade Reserve grade1 Gwalia g/t 11.1 7.8 7.8 8.0 8.1 7.0 7.7 6.3 Simberi g/t 1.43 1.09 1.09 1.03 1.05 1.07 1.06 1.2 Atlantic g/t 0.98 0.86 0.86 1.02 0.91 0.88 0.93 1.1 Total Cash Operating Costs2 Gwalia A$/oz 746 1,124 1,124 1,016 1,117 1,041 1,071 n/a n/a Simberi A$/oz 1,016 1,440 1,440 1,704 1,459 1,360 1,482 n/a n/a Atlantic A$/oz 662 747 746 669 773 675 713 n/a n/a Consolidated A$/oz 852 1,125 1,145 1,077 1,116 1,025 1,083 n/a n/a All-In Sustaining Cost2 Gwalia A$/oz 1,027 1,559 1,559 1,471 1,556 1,389 1,485 1,470 to 1,540 1,435 to 1,560 Simberi A$/oz 1,162 1,603 1,603 1,851 1,629 1,467 1,631 1,500 to 1,6453 1,665 to 1,8404 Atlantic A$/oz 862 970 964 823 951 988 928 900 to 9555 955 to 1,1006 Consolidated A$/oz 1,080 1,421 1,445 1,364 1,405 1,301 1,369 1,330 to 1,420 1,360 to 1,510 1. Ore Reserve grade at 30 June 2020, refer Ore Reserve and Mineral Resources Statement (released 24 August 2020) 5. C$810 to C$860 per ounce @ AUD 0.90 at time of release (24 July 2019) 2. Non-IFRS measure, refer Appendix. 6. C$880 to C$1,010 per ounce @ AUD 0.92 3. US$1,025 to US$1,125 per ounce @ AUD 0.68 at time of release (22 Jan 2020) 7. Atlantic Gold was acquired on 19 July 2019. Atlantic Gold production, grade and costs prior to this date provided for comparison. 4. US$1,185 to US$1,305 per ounce @ AUD 0.71 Reported Q1 Sep FY20 production and FY20 guidance includes 4,362 ounces produced by Atlantic Gold prior to acquisition. 22 / Denver Gold Forum 2020 Guidance summary – exploration, capex, production profile

Exploration Guidance FY21 A$ M Australia 8 – 9 FY21 Production  Leonora Region (US$6 M) Indicative Quarterly Guidance Profile 10 – 11  Pinjin WA, Lake Wells WA, Back Creek NSW (US$7 – 8 M) 2 – 3 Tabar Island Group, PNG (US$1 – 2 M) 10 – 12 Nova Scotia, Canada (US$7 – 9 M) 30 – 35 Consolidated (US$21 – 25 M) 29% 26% Capex Guidance FY21 24% 20% Sustaining Growth A$ M A$ M (-2%) (+2%) 70 – 80 30 – 32 Gwalia (US$50 – 57 M) (US$21 – 23 M) 12 – 15 4 – 5 Simberi FY21 FY21 FY21 FY21 (US$9 – 11 M) (US$3-4 M) Q1 Sep Q2 Dec Q3 Mar Q4 Jun 15 – 20 15 – 20 Atlantic US$11 – 14 M) (US$11 – 14 M) Indicative % of annual production (koz) 97 – 115 49 – 57 Consolidated Figures rounded to nearest percent and may not add due to rounding. (US$69 – 82 M) (US$35 – 40 M) 23 / Denver Gold Forum 2020 Note: FX conversion as per page 2 Project pipeline

Regional Nova Scotia

KEY Moose River Corridor Canada Papua New Guinea Tabar Island Group (Au, Au-Cu) Australia Equity Investments Back Creek

Leonora Province

Greater Gwalia Beaver Dam

Pinjin Cochrane Hill

Peel Mining Aust Potash1 Fifteen Mile Stream Touquoy Mine4 (16%) (Au, EJV)

Catalyst Metals Horn Island2 Simberi Sulphide Simberi Mine (14%) (Au, EJV with AQX)

Duketon Mining Catalyst Metals3 Tower Hill Gwalia Mine (12%) (Au, EJV with CYL) Equity Investments Exploration Feasibility Construction Producing

1. Earn-in and Joint Venture Agreement with Australian Potash announced 8 October 2018 2. Earn-in and Joint Venture Agreement in Horn Island with Alice Queen announced 5 June 2019 24 / Denver Gold Forum 2020 3. Earn-in and Joint Venture Agreement with Catalyst Metals announced 25 November 2020 4. For full explanation refer to ASX release 7 September 2020 “St Barbara completes acquisition of Moose River Resources Inc” FY20 financial summary  Solid NPAT, EBITDA and cash flow from operations  A$406 million cash at bank and term deposits1 (US$280 M)  A$307 million debt2 (US$212 M)  Fully franked dividends for FY20 of AUD 8 cents per share (USD 5 cents) FY20 FY19 Change A$ M 339 275 EBITDA 3 23% (US$228 M) (US$197 M) EBITDA margin 3 % 41% 42% (2%) A$ M 128 144 NPAT (11%) (US$86 M) (US$103 M) A$ M 280 241 Cash flow from operating activities 16% (US$188 M) (US$172 M) A$ M 4061 890 Cash and cash deposits (54%) (US$280 M) (US$625 M) cents 18 27 Earnings per share (basic) (33%) (USD 12 c) (USD 19 c) cents Dividend per share 8 8 - (USD 5 c) (USD 6 c) Return on equity % 10% 15% (5 points) 1. Balance comprises A$178 M cash and A$228 M term deposits as at 30 June 2020 25 / Denver Gold Forum 2020 2. Comprises of A$200 M and C$100 M syndicated debt facility (repayment date July 2022), excluding A$28 M in lease liabilities 3. Non-IFRS measure, refer to corresponding slide in Appendix. FX conversion as per page 2 Solid operational and financial performance, providing St Barbara with a platform to grow

FY20 Key Financial Metrics

EBITDA1 (A$ M) Underlying NPAT1 (A$ M) Cash flow from operating activities (A$ M) 339 108 280 (US$228 M) (US$73 M) (US$ 188 M) Up 23% since FY19 Down 24% since FY19 Up 16% since FY19

EBITDA Margin1 (%) EPS (Basic, A$ cents ) Dividend (A$ cents/share) 18 8 41 (USD 12 c) (USD 5 c) Down 2% since FY19 Down 33% since FY19 Fully franked interim and final dividends of A$0.04 ea

26 / Denver Gold Forum 2020 1. Non-IFRS measure, refer corresponding slide in appendix. FX conversion as per page 2 Balance sheet

US$ M Entitlement Offer (net receipts) Cash Debt

337

254 288 280 102 124 149 -1 -77 -169 -212

FY16 FY17 FY18 FY19 FY20 Jul 2020

27 / Denver Gold Forum 2020 Note: FX conversion as per page 2. 2020 debt position excludes A$28 M in lease liabilities, numbers may not add due to rounding Hedging summary as at 21 September 2020

Volume Price Delivery Financial Year Type Delivery Announced ounces $/oz schedule

FY21 22,000 A$1,809 Forward Sep to Dec 2020 Monthly 26 Oct 2018

FY21 14,865 A$1,961 Forward Sep to Dec 2020 Monthly 24 Feb 2020 1

FY21 29,740 C$1,759 Forward Sep 2020 to Feb 2021 Quarterly 24 Feb 2020 2

Mar 21 to European call 78,010 C$2,050 Apr 2021 to Dec 2022 Monthly 24 Feb 2020 2 Dec 22 options

28 / Denver Gold Forum 2020 1. These forward contracts replaced previous US$ 1,300/oz forward contracts, reflecting changed FX risk profile of Simberi production. 2. These forward contracts and European call options replaced previous forward contacts priced at C$1,550/oz. American Depositary Receipt Information (ADR: STBMY)

Ticker code STBMY • St Barbara established an American Depositary Type Sponsored Level 1 ADR Receipt (ADR) programme in 1994 with The Bank of New York (now BNY Mellon) as depositary. CUSIP 852278100 • St Barbara’s ADR joined the NASDAQ International Designation DR ISIN US8522781009 program in May 2018, having satisfied number NASDAQ’s International Designation compliance, market cap, financial and DR Exchange OTC www.otcmarkets.com trading requirements • Further information on the St Barbara ADR Ratio 1 ADR = 5 SBM ordinary shares program is available from The Bank of New York (BNY) Mellon Shareowner Services Depositary The Bank of New York Mellon at www.adrbnymellon.com Bank www.adrbnymellon.com

29 / Denver Gold Forum 2020 Share register

Institutional 82%

Not analysed Australia 42% 11%

USA 34%

Non Institutional 7% UK 15%

Europe 6% Rest of World 3%

Location of institutional shareholders

30 / Denver Gold Forum 2020 Analysis as at 14 August 2020 Substantial shareholders and broker coverage

Substantial Shareholders 1 Broker Research Coverage

Van Eck Associates Corp. 10.0% Canaccord Reg Spencer Citi Kate McCutcheon Vanguard Group 5.0% Credit Suisse Nick Herbert Institutional Shareholders 2 82% Global Mining Research David Radclyffe

Shares on issue 704 M Goldman Sachs Matthew Frydman

JP Morgan Levi Spry American Depositary Receipts (ADR) trade in USA through BNY Mellon Macquarie Ben Crowley (ADR OTC Code ‘STBMY’) Morgan Stanley Alex Barkley

RBC Paul Kaner

31 / Denver Gold Forum 2020 1. As notified by substantial shareholders to 18 September 2020 2. As at 14 August 2020 Board of Directors Tim Netscher Craig Jetson Chairman – Non Executive Managing Director and CEO Appointed Director February 2014. Appointed Chairman July 2015. Appointed February 2020 Mr Netscher is an experienced international mining executive with extensive Mr Jetson is a highly experienced career mining executive, having most recently operational, project development, transactional and sustainability experience served as Executive General Manager Cadia, Lihir and Global Technical Services at gained in senior executive and board roles over many years. Mr Netscher’s Newcrest Mining Limited (ASX: NCM). Previously, he was GM Lihir and prior to that experience covers a wide range of resources including nickel, coal, iron ore, held long‐term senior operating roles at Nyrstar and Zinifex in Australia, USA, uranium and gold and regions including Africa, Asia and Australia. Mr Netscher is Canada and Europe. Mr Jetson has experience in successfully leading challenging non-executive chairman of Gold Road Resources Limited and a non-executive businesses in complex operating environments, together with deep technical director of Western Areas Limited. knowledge. David Moroney Kerry Gleeson Director – Non Executive Director – Non Executive Appointed March 2015 Appointed May 2015 Mr Moroney is an experienced finance executive with more than 30 years’ Ms Gleeson is an experienced corporate executive with over 25 years’ boardroom experience in senior corporate finance roles, including 15 years in the mining and senior management experience across Europe, North America and Australasia. industry, and extensive international work experience with strong skills in finance, A qualified lawyer in both UK and Australia, Ms Gleeson has significant experience strategic planning, governance, risk management and leadership. Mr Moroney is in international governance, strategic mergers and acquisitions and complex an independent non-executive director of WA Super (Western Australia’s largest finance transactions, as well as in risk and crisis management. Ms Gleeson is a Non- public offer superannuation fund). Executive Director of Trinity College, University of Melbourne.

Stef Loader Steven Dean Director – Non Executive Director – Non Executive Appointed November 2018 Appointed July 2019 Ms Loader is a company director, geologist and former mining executive with Mr Dean’s extensive international mining experience includes a wide range of experience in mining operations, mineral exploration and project development. Ms commodities and regions including gold in Canada and Australia, metallurgical coal Loader’s experience covers a wide range of commodities and regions including in North America, and copper, zinc and energy in Canada, United States, Chile and copper and gold in Australia, Laos, Chile and Peru, and diamonds in Canada and Peru. Previously Chairman and CEO of Atlantic Gold Corporation, and former India. Ms Loader advises organisations, as a director and consultant, in the areas of President of Teck Cominco Limited (now Teck Resources Ltd), Canada’s largest leadership, strategy and regional economic development and is Independent Chair diversified resource company, Mr Dean is Chairman and CEO of Artemis Gold Inc, of Port Waratah Coal Services Limited and a non-executive director of Clean TeQ Chairman of Oceanic Iron Ore Corp and a director of Sierra Metals Inc and Velocity Holdings Ltd. Minerals Ltd. 32 / Denver Gold Forum 2020 Executive Leadership Team

Craig Jetson Garth Campbell-Cowan Managing Director and CEO Chief Financial Officer Appointed February 2020 Joined 2006 Mr Jetson is a highly experienced career mining executive, having most Mr Campbell-Cowan is a Chartered Accountant with 30 years’ experience in recently served as Executive General Manager Cadia, Lihir and Global finance and management positions across a number of different industries. He is Technical Services at Newcrest Mining Limited (ASX: NCM). Previously, he responsible for the Group’s Finance function, covering financial reporting and was GM Lihir and prior to that held long‐term senior operating roles at accounting, treasury, taxation, business analysis, capital management, Nyrstar and Zinifex in Australia, USA, Canada and Europe. Mr Jetson has procurement and information technology. Prior to joining St Barbara, he was experience in successfully leading challenging businesses in complex Director of Corporate Accounting at Telstra and has held senior finance operating environments, together with deep technical knowledge. leadership roles with WMC, Newcrest Mining and ANZ.

Rowan Cole Val Madsen Company Secretary Executive General Manager People Joined 2010 Joined 2013 Mr Cole joined St Barbara in 2010 as General Manager Corporate Services and Ms Madsen joined St Barbara in September 2013 and leads the Human was appointed Company Secretary in 2014. He has over 30 years’ experience Resources and Health, Safety, Environment and Community functions. With a across chartered accounting, retail banking, private and public companies. Mr Masters in Education and a number of other business qualifications and Cole's experience includes external, internal and IT audit, strategy formulation, accreditations, Ms Madsen has particular experience in organisational execution and measurement, process and business improvement, marketing, development, training and development, diversity and employee engagement. financial services, head of risk and compliance, chief audit executive and chief Prior to joining St Barbara, Val worked for Newcrest Mining and has extensive financial and risk officer. experience in Human Resources.

33 / Denver Gold Forum 2020 Ore Reserves Summary as at 30 June 2020

Proved Probable Total

Tonnes Gold Ounces Tonnes Gold Ounces Tonnes Gold Ounces Project ('000) (g/t) ('000) ('000) (g/t) ('000) ('000) (g/t) ('000)

Gwalia, (WA) 1,583 8.0 409 7,824 5.9 1,483 9,407 6.3 1,892

Tower Hill, (WA) - - - 2,572 3.7 306 2,572 3.7 306

Simberi Oxide, (PNG) 1,702 1.3 73 6,035 1.1 220 7,737 1.2 293

Simberi Sulphide, (PNG) 1,386 2.6 114 21,253 2.4 1,651 22,638 2.4 1,765

Simberi Stockpiles, (PNG) 678 0.6 12 - - - 678 0.6 12

Atlantic Gold, (NS) 21,370 1.2 796 23,700 1.1 851 45,070 1.1 1,647

Atlantic Gold Stockpiles, (NS) 5,450 0.5 89 - - - 5,450 0.5 89

Total All Projects 32,168 1.4 1,493 61,384 2.3 4,511 93,552 2.0 6,005

Notes 1. Ore Reserves are based on a gold price of: Gwalia (AU$1,600/oz), Tower Hill (AU$1,250/oz), Simberi and Atlantic Gold (US$1,300/oz) 2. Cut-off Grades Gwalia (4.7 g/t Au), Tower Hill (2.8 g/t Au), Simberi Oxide (0.5 g/t Au), Atlantic Gold (0.3 g/t Au – 0.5 g/t Au) 34 / Denver Gold Forum 2020 3. Mineral Resources are reported inclusive of Ore Reserves 4. Data is rounded to thousands of tonnes and thousands of ounces. Discrepancies in totals may occur due to rounding Full details are contained in the ASX release dated 24 August 2020 ‘Ore Reserves and Mineral Resources Statements 30 June 2020’ available at www.stbarbara.com.au Mineral Resources Summary at 30 June 2020

Measured Indicated Inferred Total

Tonnes Gold Ounces Tonnes Gold Ounces Tonnes Gold Ounces Tonnes Gold Ounces Project ('000) (g/t) ('000) ('000) (g/t) ('000) ('000) (g/t) ('000) ('000) (g/t) ('000)

Gwalia, (WA) 3,991 6.4 819 17,403 6.0 3,353 1,201 5.5 214 22,595 6.0 4,386

Tower Hill, (WA) - - - 4,604 3.9 574 489 3.3 51 5,093 3.8 625

Simberi Oxide, (PNG) 2,197 1.2 90 8,062 1.1 280 8,542 0.9 260 18,801 1.0 630

Simberi Sulphide, (PNG) 3,119 1.5 168 52,642 1.6 2,772 16,699 1.4 747 72,459 1.6 3,687

Atlantic Gold, (NS) 24,281 1.1 868 32,399 1.1 1,102 7,203 1.1 256 63,883 1.1 2,227

Total All Projects 33,587 1.8 1,945 115,110 2.2 8,081 34,134 1.4 1,529 182,832 2.0 11,555

Notes 1. Mineral Resources are reported inclusive of Ore Reserves 2. Cut-off Grades Gwalia (2.5 g/t Au), Tower Hill (2.5 g/t Au), Simberi Oxide (0.4 g/t Au), Simberi Transitional and Sulphide (0.6 g/t Au), Atlantic Gold (0.3 g/t Au) 35 / Denver Gold Forum 2020 3. Atlantic and Simberi Mineral Resources are reported constrained by a US$1,800/oz pit shell 4. Data is rounded to thousands of tonnes and thousands of ounces. Discrepancies in totals may occur due to rounding Full details are contained in the ASX release dated 24 August 2020 ‘Ore Reserves and Mineral Resources Statements 30 June 2020’ available at www.stbarbara.com.au Competent persons statement

Exploration Results The information in this presentation that relates to Exploration Results for Simberi and Pinjin is based on information compiled by Dr Roger Mustard, who is a Member of The Australasian Institute of Mining and Metallurgy. Dr Mustard is a full-time employee of St Barbara and has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Dr Mustard consents to the inclusion in the report of the matters based on his information in the form and context in which it appears. The information in this presentation that relates to Exploration Results for Gwalia and the Leonora region is based on information compiled by Mr Robert Love, who is a Fellow of The Australasian Institute of Mining and Metallurgy. Mr Love is a full-time employee of St Barbara and has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the ‘Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves’. Mr Love consents to the inclusion in the report of the matters based on his information in the form and context in which it appears. Mineral Resource and Ore Reserve Estimates The information in this presentation that relates to Mineral Resources or Ore Reserves for Gwalia, Tower Hill, Simberi and Atlantic Gold is extracted from the report titled ‘Ore Reserves and Mineral Resources Statements 30 June 2020’ released to the Australian Securities Exchange (ASX) on 24 August 2020. The report is available to view at stbarbara.com.au. The Company confirms that it is not aware of any new information or data that materially affects the estimates of Mineral Resources or Ore Reserves and that all material assumptions and technical parameters underpinning the estimates in the original ASX announcement continue to apply and have not materially changed. The Company confirms that the form and context in which the Competent Person's findings are presented have not been materially modified from the original ASX announcement.

Full details are contained in the ASX release dated 24 August 2020 ‘Ore Reserves and Mineral Resources Statements 30 June 2020’ available at stbarbara.com.au.

36 / Denver Gold Forum 2020 Non-IFRS measures

We supplement our financial information reporting determined under International Financial Reporting Standards (IFRS) with certain non-IFRS financial measures, including cash operating costs. We believe that these measures provide meaningful information to assist management, investors and analysts in understanding our financial results and assessing our prospects for future performance.

All-In Sustaining Cost All-In Sustaining Cost is based on Cash Operating Costs, and adds items relevant to sustaining production. It includes some, but not all, of the components identified in World Gold Council’s Guidance Note on Non-GAAP Metrics - All-In Sustaining Costs and All-In Costs (June 2013). Refer most recent quarterly report available at www.stbarbara.com.au for example. Cash contribution Cash flow from operations before finance costs, refer reconciliation of cash movement in the most recent quarterly report available at www.stbarbara.com.au Cash operating costs Calculated according to common mining industry practice using The Gold Institute (USA) Production Cost Standard (1999 revision). Refer most recent quarterly report available at www.stbarbara.com.au for example Dividend yield Dividend  share price EBIT Earnings before interest revenue, finance costs and income tax expense. EBITDA EBIT before depreciation and amortisation. EBITDA margin EBITDA  Revenue Earnings Per Share (EPS) Profit attributable to equity holders (excluding any costs of servicing equity other than ordinary shares)  weighted average number of ordinary shares outstanding during the reporting period. Net-cash Net-cash equivalent to cash and cash equivalents less current and non-current interest bearing borrowings Net-debt Net-debt equivalent to current and non-current interest bearing borrowings less cash and cash equivalents ROE ‘Return on equity’ is calculated as underlying NPAT expressed as a percentage of average total equity. Refer 2020 Directors’ and Financial Report (p3) for details Significant Items Items whose nature or amount is considered material to the financial report. Refer Note 3 of 2020 Financial Report (p56) for details Underlying EBITDA / NPAT EBITDA or NPAT after excluding identified significant items. Refer 2020 Financial Report (p3) for details. 2020 Financial Report Refer 2020 Directors’ and Financial Report available at www.stbarbara.com.au

37 / Denver Gold Forum 2020 Investor Relations enquiries

Rowan Cole Company Secretary

David Cotterell Manager Investor Relations

T: +61 3 8660 1900 E: [email protected]

Scheduled ASX Announcements 21 October 2020 Q1 September 2020 Quarterly Report

38 / Denver Gold Forum 2020